Characteristics of the composite film of arabinoxylan and starch granules in simulated wheat endosperm

We found that cell wall components of wheat grains differed significantly across different grain-filling stages; specifically, we observed significant differences in water content and water migration rate (p < 0.05). A composite film of arabinoxylan and starch granules was prepared to simulate wheat endosperm structure. Scanning electron microscopy (SEM), X-ray diffractometer (XRD), and thermogravimetric analysis (TGA) showed that the crystallinity and structural stability of the film increased with increasing starch content. Water diffusion experiments of the films revealed that the water diffusion rate gradually decreased with increasing starch content. Therefore, the water mobility of the starch endosperm was lower than that of the aleurone layer. These findings provide a basis for further studies in the context of wheat grain water regulation.

Automated summary

We found significant differences in cell wall components of wheat grains across different grain-filling stages, particularly in terms of water content and water migration rate (p < 0.05). A composite film made of arabinoxylan and starch granules was prepared to simulate the endosperm structure of wheat. Scanning electron microscopy (SEM), X-ray diffractometer (XRD), and thermogravimetric analysis (TGA) showed that the film's crystallinity and structural stability increased with higher starch content. Water diffusion experiments demonstrated that the rate of water diffusion decreased gradually with increasing starch content, indicating that the water mobility of the starch endosperm was lower than that of the aleurone layer. These findings provide a foundation for further research on water regulation in wheat grains.